What is the Cummins RS25 generator used for?

The RS25 is a 25kW liquid-cooled standby generator ideal for large homes and light-commercial sites, providing reliable backup power during outages.

Is the Cummins RS25 generator quiet?

Yes, it’s part of the Quiet Connect Series, designed for low-noise operation, making it suitable for residential neighborhoods.

Can the RS25 run on both natural gas and propane?

Yes, the generator is compatible with both natural gas and propane (LP) fuels.

What type of power output does the RS25 provide?

It delivers single-phase 120/240V power, supporting heavy residential loads and light-commercial applications.

Does the Cummins RS25 require manual startup?

No, it features automatic electric start with a compatible ATS for seamless power restoration.

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Cummins RS25 - 25kW Quiet Connect Series 120/240V 1 Phase Liquid Cooled Standby Generator - A051Y239

Cummins RS25 - 25kW Quiet Connect Series 120/240V 1 Phase Liquid Cooled Standby Generator - A051Y239

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Cummins RS25 - 25kW Quiet Connect Series 120/240V 1 Phase Liquid Cooled Standby Generator - A051Y239

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SKU PES-PS-GEN-0063

OEM Authorized Dealer BABA Compliant Full OEM Warranty 7-10 Business Day Delivery

$17,967.41 USD

$ $17,967.41 USD

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In Stock

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9+ sold

In the last 7 days

Flat Rate Shipping - Calculated at Checkout

Delivery timeframe shown above at checkout

Lifetime Customer Support

Unlimited lifetime support, always available.

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Cummins RS25 - 25kW Quiet Connect Series 120/240V 1 Phase Liquid Cooled Standby Generator - A051Y239 $17,967.41

Specifications

Datasheet

Wattage 25kW standby

Fuel Type Natural Gas / LP (Liquid Propane)

Voltage 120/240V

Phase 1-Phase

Cooling Liquid-Cooled

What is your return policy?

Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

What’s covered by your return policy?

Our returns policy covers all purchases made through Portlandia Electric Supply. For warranty issues, as authorized distributors, we honor the full manufacturer warranty of ALL the brands on our website. See our complete returns and warranty policies on our Shipping, Deliver, and Returns page.

How long will it take to receive my order?

All orders are processed within 72 hours and you can expect delivery on most orders within 5-7 business days. You will receive access to our customer portal after ordering, where it is easy to track all your shipments. See our Shipping, Delivery and Returns page for more details.

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Our legendary lifetime customer support has helped make us the #1 online solar retailer! We have a dedicated team of solar professionals standing by to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.If you need help with ordering, shipping, troubleshooting, expanding your system, warranty issues, or anything else you have questions about for as long as you own your Portlandia Electric Supply equipment, we’ve got you covered: we’re always only a phone call or email away.

Cummins RS25 – 25kW Quiet Connect Series 120/240V 1 Phase Liquid Cooled Standby Generator – A051Y239

The Cummins RS25 (MPN A051Y239) is a 25 kW liquid-cooled residential and light-commercial standby generator engineered for long-duration, high-demand backup power. As part of the Quiet Connect Series, it delivers exceptionally quiet operation, robust performance, and reliable automatic power restoration during utility outages. Designed for whole-home or business applications, the RS25 is built with advanced cooling, premium components, and Cummins’ proven standby generator technology.

Key Features

25 kW standby-rated output for heavy residential or light commercial loads
Quiet Connect Series design for low-noise operation
Liquid-cooled engine for superior durability and long running capability
Single-phase 120/240V output suitable for whole-home backup
Automatic start/stop functionality with compatible ATS
Rugged all-weather enclosure designed for outdoor installation
Clean, stable power ideal for sensitive electronics
Engineered for long-term reliability and extended outage performance

Electrical Specifications

Part Number (MPN)	A051Y239
Rated Power Output	25 kW
Voltage	120/240V
Phase	Single Phase (1Ph)
Frequency	60 Hz
Fuel Type	Natural Gas / Propane (LP)
Voltage Regulation	Automatic

Engine & Performance

Engine Type	Liquid-cooled Cummins engine
Cooling System	Liquid cooled
Start Type	Automatic electric start (with ATS)
Performance	Designed for extended operation under continuous loads
Sound Levels	Quiet Connect engineering for reduced noise output

Mechanical & Enclosure

Enclosure Material	Weather-resistant, corrosion-protected construction
Mounting	Compatible with concrete and composite generator pads
Service Access	Easy-access panels for routine maintenance
Weather Rating	All-climate outdoor installation capable

Features & Technology

Quiet operation suitable for residential neighborhoods
Self-diagnostic controls for maintenance readiness
High-capacity liquid-cooled engine for demanding loads
Stable and clean power output safe for electronics and HVAC systems
Optional remote monitoring and communication (where applicable)
Ideal for homes with large electrical loads or backup HVAC requirements

Applications

The RS25 is ideal for large residential properties or light-commercial sites requiring robust backup power. It can support high-demand systems including multiple HVAC units, pumps, refrigeration, lighting, home offices, and critical equipment. Its liquid-cooled design ensures stable performance during long outages.

Warranty & Reliability

Backed by Cummins’ industry-leading reliability and service network
Built for long-term standby operation and extended run durability
Engineered to maintain power continuity through severe weather and prolonged utility failures

What is your return policy?

What’s covered by your return policy?

How long will it take to receive my order?

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Cummins RS25 – 25kW Quiet Connect Series 120/240V 1 Phase Liquid Cooled Standby Generator – A051Y239

Key Features

25 kW standby-rated output for heavy residential or light commercial loads
Quiet Connect Series design for low-noise operation
Liquid-cooled engine for superior durability and long running capability
Single-phase 120/240V output suitable for whole-home backup
Automatic start/stop functionality with compatible ATS
Rugged all-weather enclosure designed for outdoor installation
Clean, stable power ideal for sensitive electronics
Engineered for long-term reliability and extended outage performance

Electrical Specifications

Part Number (MPN)	A051Y239
Rated Power Output	25 kW
Voltage	120/240V
Phase	Single Phase (1Ph)
Frequency	60 Hz
Fuel Type	Natural Gas / Propane (LP)
Voltage Regulation	Automatic

Engine & Performance

Engine Type	Liquid-cooled Cummins engine
Cooling System	Liquid cooled
Start Type	Automatic electric start (with ATS)
Performance	Designed for extended operation under continuous loads
Sound Levels	Quiet Connect engineering for reduced noise output

Mechanical & Enclosure

Enclosure Material	Weather-resistant, corrosion-protected construction
Mounting	Compatible with concrete and composite generator pads
Service Access	Easy-access panels for routine maintenance
Weather Rating	All-climate outdoor installation capable

Features & Technology

Quiet operation suitable for residential neighborhoods
Self-diagnostic controls for maintenance readiness
High-capacity liquid-cooled engine for demanding loads
Stable and clean power output safe for electronics and HVAC systems
Optional remote monitoring and communication (where applicable)
Ideal for homes with large electrical loads or backup HVAC requirements

Applications

Warranty & Reliability

Backed by Cummins’ industry-leading reliability and service network
Built for long-term standby operation and extended run durability
Engineered to maintain power continuity through severe weather and prolonged utility failures

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